Ratios and Proportions: Cross-Multiplication Challenge

A recipe calls for 2 cups of flour for every 3 cups of sugar. If you want to use 6 cups of sugar, how many cups of flour do you need?

• 6 cups of flour

• 3 cups of flour

• 4 cups of flour

• 2 cups of flour

In a class, the ratio of boys to girls is 4:5. If there are 20 boys, how many girls are there in the class?

• 20

• 15

• 30

• 25

A car travels 150 miles on 5 gallons of gas. How many miles can it travel on 8 gallons of gas?

• 180 miles

• 200 miles

• 300 miles

• 240 miles

If 3 apples cost $1.50, how much would 12 apples cost?

• $9.00

• $3.00

• $4.50

• $6.00

A map shows that 2 inches represent 50 miles. How many miles are represented by 5 inches on the map?

• 75 miles

• 150 miles

• 100 miles

• 125 miles

In a school, the ratio of teachers to students is 1:15. If there are 120 students, how many teachers are there?

• 5

• 8

• 10

• 12

A recipe requires 4 tablespoons of oil for every 2 cups of rice. How much oil is needed for 5 cups of rice?

• 10 tablespoons of oil

• 8 tablespoons of oil

• 6 tablespoons of oil

• 12 tablespoons of oil

If a car can travel 240 miles on 8 gallons of gas, how many gallons are needed to travel 360 miles?

• 8 gallons

• 12 gallons

• 15 gallons

• 10 gallons

The ratio of cats to dogs in a shelter is 3:2. If there are 30 cats, how many dogs are there?

• 25

• 15

• 10

• 20

A fruit stand sells oranges at a ratio of 5 for $3. How much would 15 oranges cost?

• $9

• $12

• $6

• $15